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131356-67-7

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131356-67-7 Usage

Check Digit Verification of cas no

The CAS Registry Mumber 131356-67-7 includes 9 digits separated into 3 groups by hyphens. The first part of the number,starting from the left, has 6 digits, 1,3,1,3,5 and 6 respectively; the second part has 2 digits, 6 and 7 respectively.
Calculate Digit Verification of CAS Registry Number 131356-67:
(8*1)+(7*3)+(6*1)+(5*3)+(4*5)+(3*6)+(2*6)+(1*7)=107
107 % 10 = 7
So 131356-67-7 is a valid CAS Registry Number.

131356-67-7Relevant articles and documents

Heterocyclic quinol-type fluorophores. Part 1: Synthesis of new benzofurano[3,2-b]naphthoquinol derivatives and their photo-physical properties in solution and in the crystalline state

Yoshida, Katsuhira,Ooyama, Yousuke,Miyazaki, Hirofumi,Watanabe, Shigeru

, p. 700 - 707 (2002)

Isomeric pairs of novel benzofuranonaphthoquinol-type fluorophores (2a-2c and 3a-3c) have been synthesized and their absorption and fluorescence characteristics in solution and in the crystalline state have been studied. Big differences in the absorption

Convenient Synthesis and Dichroic Properties of Heterocyclic Quinone Dyes, 3-(Dialkylamino)benzonaphthofuran-6,11-diones

Yoshida, Katsuhira,Adachi, Takako,Oga, Norio,Kubo, Yuji

, p. 2049 - 2052 (2007/10/02)

New heterocyclic quinone dyes, 3-(dialkylamino)benzonaphthofuran-6,11-diones, were conveniently prepared from 1,4-naphthoquinone and m-(dialkylamino)phenols.These dyes show dichroic properties and good solubility in a nematic liquid crystalline system.

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